|
Condensed Consolidated Balance Sheets (Parenthetical) (USD $)
|
Apr. 14, 2013
|
Sep. 30, 2012
|
|---|---|---|
| Stockholders’ equity: | ||
| Preferred stock, par value (usd per share) | $ 0.01 | $ 0.01 |
| Preferred stock, shares authorized | 15,000,000 | 15,000,000 |
| Preferred stock, shares issued | 0 | 0 |
| Common stock, par value (usd per share) | $ 0.01 | $ 0.01 |
| Common stock, shares authorized | 175,000,000 | 175,000,000 |
| Common stock, shares issued | 77,559,191 | 75,827,894 |
| Treasury stock at cost, shares | 33,362,162 | 31,955,606 |